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ASTRO-PHYSICS

GTO KEYPAD

Maintenance Instructions

July 03, 2017

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Содержание 1565GTO

Страница 1: ...ASTRO PHYSICS GTO KEYPAD Maintenance Instructions July 03 2017 ...

Страница 2: ...y Identification 8 Replacing Your GTO Keypad Battery 9 keypads 1565GTO and earlier 9 Replacing Your GTO Keypad Battery 11 keypads 1568GTO and later 11 RED FILTER SCREEN REPLACEMENT FOR KEYPAD 13 KEYPAD RESETTING SOLUTIONS 15 Receptacle for Power Connector on CP1 CP2 or CP3 Center Pin Halves Pinched Together Does not apply to CP4 15 Battery Voltage Drop 15 Break in Cable Connectors 15 Oxidation of ...

Страница 3: ...closely around the keypad controller You must work it gently into place If you force the rubber casing while it is being installed on your keypad you may tear the rubber 1 Remove the silicone rubber keypad protector KEYPRO starting at the bottom of the keypad Carefully work the protector s thin end over the cable strain relief and pull enough cable through to relieve any stress on either the keypa...

Страница 4: ...the keypad protector 2 Feed most of the cable through the opening but DO NOT pull it all the way through at this time 3 Insert the display end of the keypad into the KEYPRO Make sure that it is fully seated and that the wider part of the keypad is fully encased in the wider part of the KEYPRO 4 Finally gently work the cable the rest of the way through and carefully stretch the thin part at the bot...

Страница 5: ...eypad together arrows at right 2 Partially remove the screws Be careful not to strip the screw heads The screws do not need to be removed completely Just back them out until you feel that they are no longer engaged Be very careful separating the front and back of the keypad In particular pay attention to the cable strain relief and be careful that the display circuit board does not catch on the sc...

Страница 6: ...e sure that it is correctly plugged back in Note the spacer washers in place on their screws 1 Line up the display end before moving to the cable end of the keypad 2 The cable strain relief may need to be held and guided gently into the cutout in the case to finish mating the two halves Make a final check to be sure that no wires fibers or cables are caught between the front and back halves of the...

Страница 7: ...rews in the corners on the back of the keypad 2 Carefully open the keypad taking care to make sure that the white plastic washers on the screws are not lost Lay both halves of the keypad with the wires still connected on your work space 3 Locate the 6 wire connector that runs to the keypad cable Take note of the connector s orientation The wires of the blue AMP connector should be pointing towards...

Страница 8: ...he keypad is powered off The keypad will sometimes display the warning LOW BATTERY That does not refer to the internal database battery it is referring to the power source that is powering the mount If the internal battery fails the object information provided will be wrong Object below the horizon You may be told that the object that you wish to slew to is below the horizon when that is clearly n...

Страница 9: ...stom made with a pigtail and are not available at your local battery supplier Renata CR1632 Battery AP E0310 Real Time Clock Older Style Keypad Serial numbers up to the 1565GTO except some repaired units Renata CR2430 Battery with 6 Pigtail AP E0338 Real Time Clock Some keypads with serial numbers in the 1400GTO 1565GTO range and older keypads that have had major repair done Real Time Clock Locate...

Страница 10: ...site so that you can easily reload the database yourselves With these factors in mind we now strongly recommend that you NOT have your keypad powered up during this procedure The risk of damage to the sensitive electronics is too great At 12 volts there was never any danger to personal safety We are also recommending a somewhat different method of battery removal from the one previously published ...

Страница 11: ...y the battery out Only lift under the battery enough to lessen the tension and allow you to maneuver the bat tery up over the lip 5 Once you have cleared the lip set the screwdrivers down and use your fingertips to finish the removal The battery is not dif ficult to slide out once you have overcome the carrier lip As shown by the arrows in the two photographs you will need to maneuver the battery ...

Страница 12: ...down on your work surface Locate the six small screws in the corners Undo these screws using a 0 Phillips screwdriver Be careful not to strip the screw heads The screws do not need to be removed completely Just back them out until you feel that they are no longer engaged 3 Carefully open the keypad taking care to make sure that the white plastic spacer washers on the screws are not lost These spac...

Страница 13: ...pacer s molded clamp Be care ful not to catch any fiber optic cables 5 Gently pull the fiber optic cable away from the window before replacing the display You do not want to crush or sharply bend any of the fibers Use care when replacing the display to not scratch the window or to damage any of the optical fibers Carefully place the display in the front of the case 6 Plug the display cable into th...

Страница 14: ...the connector placements for reassembly later Fold back the display panel ribbon cable so the display and PC board are out of the way of the filter See above photos You will need to remove the original filter by prying it loose from the cover This may be done by carefully prying the upper edge away from the cover or by pushing from the other side or by a combination of the two techniques By gentle...

Страница 15: ...d surface of the filter to form a tight seal completely around the frame Leave the Scotch 468MPH waxed label in place Carefully put the display panel back in place Check to be sure that it is properly seated so that no undue pressure is placed on it when the keypad is closed Note that screws will need to align through the corner holes Reconnect the internal cabling return the cover to the unit and...

Страница 16: ...cant load the load will momentarily drop below 9 volts and the keypad will reset or it may affect the GTO circuit itself and cause the keypad to lock up If you plan to use a single battery to power multiple items we recommend that you use a large marine battery that is not a gel cell and hook everything up to it before calibrating the GTO Break in Cable Connectors Examine all of your power and mot...

Страница 17: ...he R A and Dec coordinates of where your telescope is pointing The mount will track as if nothing has happened If the keypad screen has changed to another menu simply return to the screen that you were in to continue your session Keypad resets are annoying with these keypad versions but do not cause a major interruption of your session Keypad version 2 6 or earlier If the keypad resets the mount w...

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